Neutral safety switch

Like 694spd said that's your neutral safety switch (NSS). If your car is apart I highly suggest factory manuals. Free downloads at mymopar.com, just make sure they are factory.
Also I have pdf copies of the factory supplement that wasnt included in the Plymouth factory service manual send me a msg with your email and I can email to you.

Valley Boy said

I have 1967 Barracuda with auto trans. There is a wire attached to a single pole switch above trans pan on left rear of transmission. What is the propose of this switch and what is it connected to. My car is apart and end of wire coming out between fire wall and rear of motor was cut off by mistake. Help please

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